I also think it is a good idea. I'm an example of dwindling involvement on PC. :D (Though my reason is work related stuff. The site is a great place
I still think it would be beneficial to let people carry more responsibility and maybe give them a bit more freedom in how they can add to the site, I think it would probably pull them back on here more often because they'll feel like their input actually counts.

Of course, everything still needs to remain in order and you can't have everyone just doing what they want, so I hope it is possible to find a middle ground on this.